1. A Broadband Near-IR Detector Based on a Large-Area InGaAs Photodiode for Time-Resolved Detection of Singlet Oxygen
- Author
-
A. S. Bogomolov, Alexey V. Baklanov, V. G. Gol’dort, A. P. Pyryaeva, A. V. Demyanenko, and S. A. Kochubei
- Subjects
010302 applied physics ,Materials science ,010308 nuclear & particles physics ,business.industry ,Frequency band ,Photodetector ,01 natural sciences ,Signal ,Photodiode ,law.invention ,law ,0103 physical sciences ,Optoelectronics ,business ,Luminescence ,Instrumentation ,Noise-equivalent power ,Sensitivity (electronics) ,Passband - Abstract
A broadband near-IR photodetector based on a large-area G12180-250A InGaAs photodiode (Hamamatsu) with a 5-mm-diameter photosensitive area was developed and tested. It is designed for detecting the IR luminescence of singlet oxygen. A circuit for signal amplification is assembled on the basis of broadband low-noise operational amplifiers with the subsequent filtering of a signal with an adjustable passband f varied from 15 to 600 kHz, thus allowing one to obtain a time resolution of better than 1 µs, a sensitivity level of 107–109 V/W, and a noise equivalent power NEP [W/Hz1/2] ≈ 1.4 × 10–14λ–1[µm] f [kHz] in a frequency band of 15–600 kHz.
- Published
- 2019